• "Unit 3 is characterized by the disappearance of the carbonate facies and predominance of mudstones. This is interpreted as a muddy intertidal flat deposit...Despite a large discontinuity existing within unit 3, or at its upper or lower boundaries, the intertidal facies can be integrated withing[sic].." terregenous delta-derived material prograding into a shallow lagoon (Diaz et al. 1987).